Direct Variation: If y varies directly as x, then y=kx, or y/x=k, where k is the constant of variation.
If y varies directly as x and y=8 when x=4, find the constant of variation and write an equation of direct variation.
8=k4
To find k, you have to do opposite operations. So you would divide 8 by 4 which = 2. So k=2
To check it, plug in your numbers.
8=2*4
If y varies directly as x, then y=kx, or y/x=k, where k is the constant of variation.
If y varies directly as x and y=8 when x=4, find the constant of variation and write an equation of direct variation.
8=k4
To find k, you have to do opposite operations. So you would divide 8 by 4 which = 2. So k=2
To check it, plug in your numbers.
8=2*4